|HTML App||Add an App to a Playlist Zone that is of the type HTML|
|HTML Overlay||Enable the HTML Overlay within the Overlay section of the Playlist properties.|
The HTML App is like other TelemetryTV Apps in that it exists within a Playlist Page on a Zone. It is automatically created when the page is displayed and disposed of when the page is removed.
In contrast the HTML Overlay persists through-out the playback of the Playlist. It is only created when the Device starts to display the Playlist and then it is disposed when the Device restarts.